Always copy your original .rmmzsave file to a secure folder before making changes.

It features automatic backups , saving the five most recent versions of your file in a .rmse_backups folder to prevent data loss.

An RMMZ save file is not a binary blob but a text-based container. When a player saves their game, the engine serializes the global game objects into a JSON (JavaScript Object Notation) format.

An .rmmzsave file is a compressed text file containing the entire state of an RPG Maker MZ game session. RPG Maker MZ structures save data using JSON (JavaScript Object Notation), which organizes information into clear, readable key-value pairs. However, to save disk space and prevent accidental tampering, the game engine compresses this JSON data into a raw text string before writing it to your drive. Where to Find RMMZ Save Files

Right-click the game in Steam > Manage > Browse local files . Look for a folder named save . Your saves will be titled file1.rmmzsave , file2.rmmzsave , etc.